@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";:root{--bg-color:#f9fafb;--panel-bg:#fff;--text-primary:#111827;--text-secondary:#6b7280;--accent-primary:#4f46e5;--accent-primary-hover:#4338ca;--accent-light:#e0e7ff;--border-color:#e5e7eb;--input-bg:#f3f4f6;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f;--shadow-premium:0 20px 25px -5px #0000000d, 0 10px 10px -5px #00000005;--error-color:#ef4444;--success-color:#10b981}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-primary);-webkit-font-smoothing:antialiased;flex-direction:column;min-height:100vh;font-family:Inter,system-ui,-apple-system,sans-serif;display:flex;overflow-x:hidden}h1,h2,h3{letter-spacing:-.02em;font-weight:600;line-height:1.2}a{color:inherit;text-decoration:none;transition:color .2s}a:hover{color:var(--accent-primary)}button{cursor:pointer;border:none;outline:none;font-family:inherit;transition:all .2s}.btn-primary{background-color:var(--accent-primary);color:#fff;box-shadow:var(--shadow-sm);border-radius:8px;padding:.875rem 1.5rem;font-size:1rem;font-weight:500}.btn-primary:hover:not(:disabled){background-color:var(--accent-primary-hover);box-shadow:var(--shadow-md);transform:translateY(-1px)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-secondary{color:var(--text-primary);border:1px solid var(--border-color);box-shadow:var(--shadow-sm);background-color:#fff;border-radius:8px;padding:.875rem 1.5rem;font-weight:500}.btn-secondary:hover:not(:disabled){background-color:#f9fafb}.classic-panel{background-color:var(--panel-bg);border:1px solid var(--border-color);box-shadow:var(--shadow-premium);border-radius:16px}.sender-panel{flex-direction:column;flex:1;padding:3rem;display:flex}.panel-header{align-items:center;gap:.75rem;margin-bottom:2rem;display:flex}.icon-wrapper{background-color:var(--accent-light);color:var(--accent-primary);border-radius:8px;justify-content:center;align-items:center;padding:.5rem;display:flex}.panel-header h3{margin:0;font-size:1.25rem}.drop-zone{border:2px dashed var(--border-color);cursor:pointer;background-color:var(--bg-color);border-radius:12px;flex-direction:column;flex:1;justify-content:center;align-items:center;width:100%;min-height:250px;padding:2rem;transition:all .2s;display:flex}.drop-zone:hover,.drop-zone.dragging{background-color:var(--accent-light);border-color:var(--accent-primary)}.drop-icon{color:var(--accent-primary);opacity:.9;margin-bottom:1rem}.drop-title{color:var(--text-primary);margin-bottom:.5rem;font-size:1.1rem;font-weight:600}.drop-subtitle{color:var(--text-secondary);margin-bottom:1.5rem;font-size:.9rem}.file-ready-state{flex-direction:column;flex:1;justify-content:center;align-items:center;width:100%;display:flex}.file-list-header{justify-content:space-between;align-items:center;width:100%;margin-bottom:1rem;display:flex}.header-left{align-items:center;gap:1rem;display:flex}.add-more-btn{cursor:pointer;background:0 0;border:none;justify-content:center;align-items:center;padding:0;display:flex}.add-more-btn:hover{opacity:.8}.header-text{flex-direction:column;display:flex}.header-text h4{color:var(--text-primary);margin:0;font-size:1.1rem;font-weight:600}.header-text span{color:var(--text-secondary);font-size:.85rem}.reset-btn{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;font-size:.9rem}.reset-btn:hover{color:var(--error-color)}.file-list-container{border:1px solid var(--border-color);background-color:#fafafa;border-radius:4px;width:100%;max-height:200px;margin-bottom:1.5rem;overflow-y:auto}.file-list-item{border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:.75rem 1rem;font-size:.85rem;display:flex}.file-list-item:last-child{border-bottom:none}.file-name{color:var(--text-secondary);white-space:nowrap;text-overflow:ellipsis;max-width:70%;overflow:hidden}.file-size{color:#9ca3af;white-space:nowrap}.w-full{width:100%}.mt-4{margin-top:1rem}.code-display-area{flex-direction:column;align-items:center;width:100%;display:flex}.code-label{color:var(--text-secondary);margin-bottom:1rem;font-size:.9rem;font-weight:500}.code-box{gap:.5rem;margin-bottom:1.5rem;display:flex}.code-char{color:var(--text-primary);background-color:var(--input-bg);border:1px solid var(--border-color);border-radius:8px;justify-content:center;align-items:center;width:3.5rem;height:4.5rem;font-size:2rem;font-weight:700;display:flex}.timer-box{color:var(--text-secondary);align-items:center;gap:.5rem;font-size:.9rem;font-weight:500;display:flex}@media (width<=600px){.sender-panel{padding:1.5rem}.code-box{gap:.25rem}.code-char{width:2.5rem;height:3.5rem;font-size:1.5rem}.drop-zone{min-height:200px;padding:1rem}.code-actions{flex-direction:column;align-items:center}}.receiver-panel{flex-direction:column;flex:1;padding:3rem;display:flex}.receiver-content{background-color:var(--bg-color);border:1px dashed var(--border-color);border-radius:12px;flex-direction:column;flex:1;justify-content:center;align-items:center;padding:2rem;display:flex}.receive-instruction{color:var(--text-primary);text-align:center;margin-bottom:2rem;font-size:1.1rem;font-weight:500}.receiver-input-group{flex-direction:column;align-items:center;gap:2rem;width:100%;display:flex}.digit-inputs{justify-content:center;gap:.75rem;display:flex}.digit-input{text-align:center;background-color:var(--panel-bg);border:1px solid var(--border-color);width:3.5rem;height:4.5rem;color:var(--text-primary);border-radius:8px;font-size:2rem;font-weight:700;transition:all .2s;box-shadow:0 1px 2px #00000005}.digit-input:focus{border-color:var(--accent-primary);outline:none;box-shadow:0 0 0 3px #4f46e526}.receive-btn{justify-content:center;align-items:center;width:100%;max-width:300px;display:flex}.spinner{animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media (width<=600px){.receiver-panel{padding:1.5rem}.receiver-content{padding:1.5rem 1rem}.digit-inputs{gap:.25rem}.digit-input{width:2.5rem;height:3.5rem;font-size:1.5rem}.receiver-input-group{gap:1.5rem}}.app-container{flex-direction:column;width:100vw;min-height:100vh;display:flex}.app-header{background-color:var(--panel-bg);border-bottom:1px solid var(--border-color);justify-content:space-between;align-items:center;padding:1.25rem 3rem;display:flex}.logo-container{align-items:center;gap:.75rem;display:flex}.logo-text{color:var(--text-primary);letter-spacing:-.02em;margin:0;font-size:1.5rem;font-weight:700}.nav-links{gap:2.5rem;display:flex}.nav-links a{color:var(--text-secondary);font-size:.95rem;font-weight:500}.nav-links a:hover{color:var(--accent-primary)}.app-main{flex-direction:column;flex:1;align-items:center;gap:2.5rem;padding:2.5rem 3rem;display:flex}.ad-banner{background-color:var(--input-bg);color:#9ca3af;letter-spacing:1px;text-transform:uppercase;border:1px dashed #d1d5db;border-radius:8px;justify-content:center;align-items:center;width:100%;max-width:970px;min-height:90px;font-size:.85rem;font-weight:500;display:flex}.transfer-container{flex-direction:row;align-items:stretch;gap:2.5rem;width:100%;max-width:1100px;margin:0 auto;display:flex}.app-footer{text-align:center;color:var(--text-secondary);background-color:var(--panel-bg);border-top:1px solid var(--border-color);margin-top:auto;padding:1.5rem;font-size:.875rem}@media (width<=900px){.transfer-container{flex-direction:column}.app-header{padding:1rem 1.5rem}.app-main{padding:1.5rem}}@media (width<=600px){.app-header{flex-direction:column;gap:1rem;padding:1rem}.app-main{gap:1.5rem;padding:1rem}.nav-links{gap:1.5rem}.logo-text{font-size:1.25rem}}